is it normal for symptoms to come and go in early pregnancy?

I'm 9 weeks and 2 days ago I was feeling really rough in the evenings and being sick and now nothing😔 No sore boobs and don't even feel tired. A little bit constipated but not sure whether that's because I had my 1st 💩 in 2-3days. I didn't like feeling sick but now I wish it would come back. The round ligament pains don't seem to be here anymore. Has this happened to anyone before?